Excerpt: Chapter 1. Quantum Mechanics Describes Matter in Terms of Wave functions and Energy Levels. Physical Measurements are Described in Terms of Operators Acting on Wave functions. Operators, Wave functions, and the Schr”dinger Equation The trends in chemical and physical properties of the elements described beautifully in the periodic table and the ability of early spectroscopists to fit atomic line spectra by simple mathematical formulas and to interpret atomic ele...

By: Mckerrow, Ronald Brunlees, 1872-1940

By: Lewis Carroll

Alice is about to pick daisies when a white rabbit approaches her, but this rabbit is not like any other rabbit she has seen. Her curious nature forces her to follow the rabbit for a wonderful adventure.

By: T.C. O?Donnell

Excerpt: Not to be fantastical but to be phantasmagorical that I am sure is the way to write the proper bed-time story. A country should appear as if it grew with its seas and mountains out of the figures on the carpet the room...

By: Gürpinar, Hüseyin Rahmi, 1864-1943

By: Benson, Paul George, 1946

By: Liz Mcgrath

Do you know that an empowering word can spark ideas, open doors, change attitudes, and create solutions? Words can do all these things and much more. They have the potency to redefine personalities, lives, and entire communities. Just think of some of the things words are used for every day: To communicate a message To express a feeling To interact with others To associate meaning, intention, and tone To record history To tell stories And so much more! When used the righ...

By: Birnbaum, Allan

By: U.S. Census Bureau Department

Statistical Reference Document

Excerpt: Proposals are made for more comprehensive historic and current analysis of the periodic, systematic, and event-conditioned components in economic time series. The effects of unusual events U are distinguished from regular seasonality sand other periodic ...

By: David F. Findley

Statistical Reference Document

Excerpt: This paper advances simple theoretical arguments in favor of selecting and estimating a different linear forecasting ?model? for each prediction period (lead) m for which a forecast is desired. For these arguments, it is assumed that the series being forecast is covariance stationary and is not perfectly modeled by the one-period-ahead forecasting model which is fit to it. Two examples are given using well-known series which illustrate one possible implementatio...

By: Thomas M. Trimbur

Statistical Reference Document

Excerpt: Methods are developed for estimating trends in time series subject to level shifts. The approach is based on specifying stochastic models for breaks as part of the model structure, using heavy-tailed densities to allow for a positive probability of such a ...

By: Pardo de Tavera, Trinidad Hermenegildo, 1857-1925

By: Paul G. Wakim

Statistical Reference Document

Excerpt: In the National Crime Survey (NCS) conducted by the Bureau of the Census for the Bureau of Justice Statistics, a sampled household is interviewed every six months for three years. The first of the seven interviews, the bounding interview, is used only to set a time frame in order to avoid duplicating reported crimes on subsequent visits. The estimated crime levels and rates that are computed from the NCS are based on the last six interviews only. For further det...

By: Craig, Austin, B. 1872

By: William E. Winkler

Statistical Reference Document

Excerpt: This paper reports the results of research and analysis undertaken by Census Bureau staff. It has undergone a Census Bureau review more limited in scope than that given to official Census Bureau publications. This paper is released to inform interested ...

By: William E. Winkler

Statistical Reference Document

Introduction: Record linkage is the science of finding matches or duplicates within or across files. Matches are typically delineated using name, address, and date-of-birth information. Other identifiers such as income, education, and credit information might be used. With a pair of records, identifiers might not correspond exactly. For instance, income in one record might be compared to mortgage payment size using a crude regression function. In the computer science lit...